Opposing actions of native and oxidized lipoprotein on motor neuron- like cells

Jeffrey N. Keller, Keith B. Hanni, Ward A. Pedersen, Neil R. Cashman, Mark P. Mattson, S. Prasad Gabbita, Veronica Friebe, William R. Markesbery

Research output: Contribution to journalArticle

Abstract

Lipoproteins are present in the central nervous system and surrounding vasculature and possibly mediate effects relevant to neuronal physiology and pathology. To determine the effects of lipoproteins on motor neurons, native low density lipoproteins (LDL) and oxidized LDL (oxLDL) were applied to a motor neuron cell line. Oxidized LDL, but not native LDL, resulted in a dose- and time-dependent increase in reactive oxygen species and neuron death. Oxidized LDL-induced toxicity was attenuated by a calcium chelator, antioxidants, caspase inhibitors, and inhibitors of macromolecular synthesis. In addition to being nontoxic, application of native LDL attenuated reactive oxygen species formation and neuron loss following glucose deprivation injury. Together, these data demonstrate a possible neuroprotective role for unmodified lipoproteins and suggest oxidized lipoproteins may amplify oxidative stress and neuron loss.

Original languageEnglish (US)
Pages (from-to)202-210
Number of pages9
JournalExperimental Neurology
Volume157
Issue number1
DOIs
StatePublished - May 1999
Externally publishedYes

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Keywords

  • Calcium
  • Caspase
  • Low density lipoprotein
  • Oxidized low density lipoprotein
  • Reactive oxygen species

ASJC Scopus subject areas

  • Neurology
  • Neuroscience(all)

Cite this

Keller, J. N., Hanni, K. B., Pedersen, W. A., Cashman, N. R., Mattson, M. P., Gabbita, S. P., Friebe, V., & Markesbery, W. R. (1999). Opposing actions of native and oxidized lipoprotein on motor neuron- like cells. Experimental Neurology, 157(1), 202-210. https://doi.org/10.1006/exnr.1999.7043